The front and back of the white flat mask can be distinguished by metal strips, creases, thread ends, colors and fabrics.
1. Metal strip distinction
Differentiated by metal strips, usually the color of medical masks is the same, which makes it difficult for people to distinguish. Generally, the metal strip is above and the side protruding outward is the outside, and the opposite side is inside.
2. Classification of creases
It is distinguished by creases, the upward side of the crease is the inner surface, and vice versa is the outer surface.
3. Distinguish between thread ends
The side with thread ends is outside, otherwise, the side without thread ends is opposite.
4. Color differentiation
The color of the front and back of the mask is mostly different, the outer layer is mostly light blue or dark; the inner layer is mostly white or light.
5. Fabric classification
According to the degree of smoothness, the outward-facing part of the mask is mostly smooth because of its water-blocking function; and the inner-facing part is selected to be a material with good breathability, which is close to the skin and conducive to breathing.
Precautions for use:
1. Duration of use
From the point of view of human physiology, blood circulation in the nasal mucosa is very strong, and the channels in the nasal cavity are very tortuous. The nose hairs constitute a filtering "barrier". When air is inhaled into the nostrils, the airflow forms a vortex in the tortuous channel, which heats the airflow into the nasal cavity.
Some tests have shown that when cold air at minus 7 ° C is drawn into the lungs through the nasal cavity, the airflow has been heated to 28.8 ° C, which is very close to the temperature of the human body. If you wear a mask for a long time, the nasal mucosa will become fragile and lose the original physiological function of the nasal cavity, so you cannot wear a mask for a long time.
2. Cleaning and maintenance
The outer layer of the mask often accumulates a lot of dust, bacteria and other dirt in the outside air, and the inner layer blocks the exhaled bacteria and saliva. Therefore, the two sides cannot be used alternately, otherwise the dirt contaminated by the outer layer will be directly attached When inhaled into the body, it becomes a source of infection. When the mask is not worn, it should be folded and placed in a clean envelope, and the side that is close to the nose and nose should be folded inwards. Do not stuff it into your pocket or hang it around your neck.
3. Handle properly
Daily use of masks should be properly handled. Masks used by patients or used during care should be placed in a lined container in the patient room before being processed.